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How to Choose a Servo Voltage Stabiliser?

Power-ups and downs are common, yet picking the right servo voltage stabiliser is more than just saving your gear. It is about smooth function and saving energy. If you own a home or a business, the right stabiliser is critical to fighting power woes. Your devices need steady power, and a top servo voltage stabiliser can keep them humming and holding up longer. Gear up with the know-how to nail the perfect pick and keep your power needs met without a hitch.

Understanding Servo Voltage Stabiliser Needs

In places where power is less stable, your equipment, life, and work can take a hit. A top-notch servo voltage stabiliser keeps the current even, shielding stuff like ACs and washers from harm. It is not just a guard. It also reduces energy use, saving you cash on power costs. When you are eyeing power fixers for your spot, It is vital to snag one that fits your scene. With the right gear, rest easy, knowing your devices are safe and in top form. Explore our blog to discover if a Servo Voltage Stabiliser is the solution you need.

How to Determine the Right KVA for Stabilisers

Picking a servo voltage stabiliser means figuring out the total KVA you need for your gear. To get it right, you should:

  • List all the things you will hook up.
  • Write down each one’s KVA rating.
  • Add them up to get the total KVA your stabiliser should handle.
  • Refer to technical guides before buying voltage stabilisers.

After adding up the KVAs and checking the proper guides, you will be set to pick a stabiliser that meets your power needs, keeping your electrical stuff working well and lasting long.

Choosing the Correct Phase Type for Stabilisers

Picking the right phase type for your servo voltage stabiliser is vital for your gear's safety. A one-phase system, common in houses, matches with a one-phase stabiliser. A three-phase stabiliser is a must for bigger places with three-phase systems.

Get the phase type right for your grid to ensure peak work and safety. Stabilisers are key, as they are big players in your gear life and function. To get a deeper look, check out why stabilisers are crucial. With the phase type down, eye your spot's voltage scene for steady protection for your gear.

Assessing Voltage Requirements for Stabilisers

Choosing a servo voltage stabiliser means knowing the input voltage band. This tells you the voltage swing where the stabiliser can tweak the incoming power to a safe, steady output. If your spot voltage often strays from this band, your stabiliser might fail, risking your gear.

Most stuff works within the usual output voltage band of 380 to 415 V AC, but you can tailor this to fit your gear's needs. Nantech’s servo stabilisers let you tweak the output voltage for your devices' best work and safety.

Collect information on the low and high voltage events to pick a stabiliser for your site’s voltage ups and downs. This will guide you to a stabiliser with an input voltage band wide enough for these swings, guaranteeing voltage stabilisation for your gear. With the right gear, your stuff won't just be safe. It will work like a charm.

Load Capacity and Response Time in Stabilisers

Protecting your gear from voltage swings means looking at a servo voltage stabiliser's load capacity and response speed. When you are scoping out a servo voltage stabiliser for your stuff, keep these points in mind:

  • Figure out the total power your devices consume to ensure the stabiliser can handle the load.
  • Ensure the stabiliser can take the load.
  • Go for a stabiliser that reacts fast to sudden voltage shifts.
  • Think about how key regular upkeep is.

By zeroing in on these specs and upkeep roles, you will find a stabiliser that fits your load needs and snaps to voltage swings fast, keeping your devices safe and efficient.

Evaluating Stabiliser Build Quality and Safety

When you are in the market for a servo voltage stabiliser, its build and lasting power are key for steady work over time. Different ways to mount, like on a wall or floor, fit different install needs and help save space and fight off the elements.

Safety bits, especially overload protection, are crucial to stop your devices from getting fried by cutting the output when the load gets too much. As you weigh these points, remember that the right stabiliser will blend into your electric setup, adding to your operation's overall safety and efficiency.

Servo Stabiliser- Brand Reputation and Maintenance

Choosing a servo voltage stabiliser from a brand with a good reputation is important for your gear life and top work. To make sure you are putting your money into a servo voltage stabiliser that will last and perform, think about these key points:

  • Go with a stabiliser from a well-known brand for trust and top quality.
  • Look at the warranty and how easy it is to keep up with the brand.
  • Read what customers say and see if the brand sells abroad.

Keeping these in mind will guide you to a smart buy, ensuring you get a product that delivers steady work and has your back after you buy it.

Empowering Your Power Management Strategy

Making a smart pick for a servo voltage stabiliser means choosing one that will last. Remember how vital stabilisers are in managing your power. It is clear that investing in a trusted servo voltage stabiliser is not just smart. It is necessary for keeping your appliances safe. Lock down your power with Nantech’s knowledge and look forward to a future where efficiency and safety go hand in hand.

Why not get a free power fix consultation with the leading servo voltage stabiliser dealers in Chennai? Contact Nantech’s experts today.

Discovering the Functionality of Servo Voltage Stabilizers

Examining The Vital Role of Servo Voltage Stabilizers

Sensitive electronic equipment may break down with an unstable power supply. This will affect the business continuity and the equipment. 230 and 415 volts are the low-voltage electric power distribution standards for single-phase and three-phase. Most of the electrical equipment, especially single-phase ones, are made to work with voltages between 220 and 240V. Voltage variations usually range from 170 to 270 V. When there is a voltage swing; appliances may experience substantial negative impacts.

By regulating voltage fluctuations, servo voltage stabilizers are crucial to any electrical supply equipment. If you own sensitive electrical equipment at home, contact any renowned servo stabilizer manufacturer in Chennai for assistance. Servo stabilizers guard against damage and electrical risks. In this blog, learn more about servo voltage stabilizers' uses, applications, and how they may safeguard your appliances.

Impact of Voltage Fluctuations Explained by Top Servo Stabilizer Manufacturers in Chennai

High voltage

When the voltage is high, electrical and electronic equipment's no-load current rapidly rises. High current damages electrical and electronic equipment's insulation, accelerates equipment failure, and increases equipment losses due to overheating.

Low voltage

Electric equipment's no-load current does not rise at low voltage, which does not impact the equipment's lifespan. However, if the voltage is too low (370V), the consumer must use a DG set, which is quite expensive.

Let us discuss how the failure of various electronic equipment happens with voltage fluctuation here.

  1. Lights: Low voltage decreases lumen output, further shortening the lamp's life.
  2. AC motor: When the voltage is low, the AC motor produces less torque, which reduces speed, and when the voltage is high, it generates more speed than is required.
  3. Induction heating: Low voltage decreases heat output, causing the load to operate at temperatures that are not ideal and deviating from the desired range.
  4. Radio and TV: A voltage drop will lower the transmission quality and result in other electronic parts' failure.
  5. Refrigerators: AC motor-driven devices like refrigerators draw a lot of currents when a voltage drops, which could cause the windings to overheat.

Elaborating on Servo Voltage Stabilizers & Its Importance

A servo stabilizer is necessary to maintain consistent voltage and protect priceless gadgets to gain the desired performance. A voltage regulator employs a feedback control method to maintain a constant output voltage. It is employed in circumstances where the input voltage is unpredictable or vulnerable to fluctuations. Servo stabilizers are recommended in regions with a poorly controlled power grid or where frequent blackouts or brownouts affect the electrical supply.

Compared to traditional voltage regulators like transformers, servo voltage stabilizers are accurate. They respond to changes in input voltage more quickly and efficiently. These features make servo voltage stabilizers suitable for various applications to safeguard expensive and fragile electronic machinery.


Although servo stabilizers primarily regulate voltage, they also include a few additional characteristics to make them more user-friendly. Depending on the mounting method, servo stabilizers are often designed in various versions.

There are ones that are pole-mounted and wall-mounted, so they may be installed at positions that are high from the ground level. This is to prevent any power-related mishaps. As a result, they guarantee a safer environment in different areas.

To maintain security, they also include a time delay system. They may have more time to deal with the uneven voltage situations. They have a metre to view the voltage and other crucial power parameters. LED indicators are utilised for displaying a variety of things.

They enable overload prevention by quickly responding to an unexpected short-circuit, power outage, or integrated circuit burn. Therefore, servo stabilizers are user-friendly, environmentally friendly, trustworthy, and efficient.

All About the Benefits, Applications & Usage of Servo stabilizers


  1. A servo voltage stabilizer can keep the output voltage stable even in varying input voltages.
  2. They provide regulation that saves energy with more than 98% effectiveness.
  3. Servo voltage stabilizers are more precise than other kinds of voltage regulators.
  4. They react to fluctuations in the input voltage more quickly than other varieties of voltage regulators.
  5. Servo voltage stabilizers often consume less electricity and are more beneficial to the environment than other varieties of voltage regulators.
  6. It stops overloads and short circuits.
  7. It increases the longevity and durability of your electrical appliance by reducing damage from fluctuations.
  8. They are budget-friendly.

Applications & usage

To safeguard delicate electronic equipment, servo voltage stabilizers can be applied in a variety of contexts, including industrial, commercial, and residential ones.

Printing equipment

Even a slight voltage difference can ruin printed material. Therefore, servo stabilizers and equipment like flexographic machines, offset lithography, digital printing inkjet, and xerography are necessary for the printing sector.

CNC machines

CNC machines and other imported machinery require protection against voltage and power-related problems. This is because they possess intricate circuits that are precisely calibrated to specific output voltages, a guarantee that can only be achieved by utilising a high-quality servo stabilizer.

Medical equipment

Medical equipment is expensive. For these reasons, protecting the equipment from voltage issues such as spikes and fluctuation is essential. By limiting the incoming voltage, servo stabilizers are crucial equipment that prevents overloading. Servo stabilizers are of great use to medical equipment like CT scanners and MRI machines and prove to be a wise investment.


Machines in the textile industry frequently use three-phase supply lines, and these connections often experience voltage swings. A servo stabilizer is used to stop such voltage fluctuations so that the machines run without technical problems like overloading. Eventually, it helps in preventing any harm to the electrical equipment.


Modern industrialists managing factories understand the value of servo voltage stabilizers and voltage controllers. They never think twice and invest in servo voltage stabilizers during the early stages while planning the factory.

Servo voltage stabilizers are widely used in various industries, including engineering, cold storage, air conditioning, cement, flour, oil, paper, rubber, tea estates, food processing, footwear and leather, distilleries and beverages. They are also used in clubs, multi-storey buildings, call centres and export houses.

Final words

When voltage stabilizers are implemented, you won't need to make any expensive replacements or repairs. Servo stabilizer suppliers will ensure that voltage fluctuations are taken care of in any circumstance. Contact Nantech Power Systems, one of the best UPS manufacturers in Chennai, and we'll help you determine the best course of action for your company's requirements.

Servo Voltage Stabilizers: - Air-Cooled vs Oil-Cooled

To protect your critical types of equipment Nantech power systems Pvt.Ltd. the best servo voltage stabilizer dealers provide one of the best voltage stabilizers in Chennai city. This city is already advanced in technologies providing the futuristic level of hardware designs. If you are looking for servo voltage stabilizers your search ends here.


Voltage stabilizers are used to stabilize or regulate the voltage if the voltage is fluctuating over a given range. The main purpose of stabilizers is to provide a constant voltage to load or appliances.Servo Stabilizer is a Servo motor driven stabilization system that performs optimum voltage supply.

Servo stabilizer is an electromechanical device therefore its voltage correction speed is slower than static voltage stabilizer.

Following are the two types of servo voltage stabilizers

  • Air-cooled Servo Voltage Stabilizers
  • Oil-cooled Servo Voltage Stabilizers

Air-cooled Servo Voltage Stabilizers:

Air-cooled Servo Voltage Stabilizers are very much useful for various electrical as well as electronic applications.The servo stabilization mechanism with air-cooling means efficiently ensures optimumvoltages.This stabilizer includes a transformer and a power control circuit for controlling output AC voltage. The negative feedback circuit controls the voltage or power automatically and regulates it to a level that’s set or required. The most effective part is that within the entire operation, the voltage regulator doesn’t require any manual interruption, it functions automatically.

Oil-cooled Servo Voltage Stabilizers: -

Oil-cooled have inherently higher short-time or sustained overload capacity as compared to Air-cooled types. The main difference between oil-cooled and air-cooled stabilizers is the capacity of oil-cooled stabilizers are for higher capacity. These are used in places where there is a high frequency of fluctuating voltage in the power supply. Anoil-cooled stabilizer guarantees that the fluctuation in the power supply does not affect the electronic or electricaltypes of equipment.


Air-cooled servo voltage stabilizer Oil-cooled servo voltage stabilizer
Cooling type Natural Air-cooled Oil-cooled
Mode of system Fully Automatic Fully Automatic
Input Voltage 300-460V / 340-480V / 360-460V 3Phase 300-460V / 340-480V / 360-460V 3Phase
Frequency 45 - 55 Hz 45 – 55 Hz`
Connections Star Star
Output voltage 380 - 400V 380 - 400V
Waveform Distortion Nil Nil
Output Waveform As same as Input As same as Input
Operating Temperature 0°C to 45°C 0°C to 45°C
Insulation Class F Class F
Output Voltage Regulation +1% (No Load/Full load) +1% (No Load/Full load)
Efficiency 98% 98%
  • High Efficiency
  • Changeover/ By-pass facility.
  • Digital Voltmeter/ Am-meter.
  • Under Voltage cutoff Protection through the contactor.
  • Short circuit protection through MCB.
  • Zero waveform Distortion
  • Auto-Manual Operation facility
  • Low Power consumption.
  • Reliable Performance and trouble-free operation
  • Customized solution is available on request.
  • Instant Response.
  • Fast correction.
  • Digital Metering System
  • Efficiency upto 98%.
  • Short circuit protection through MCB.
  • Low Power consumption
  • Customized solution is available on request
  • CNC Machines
  • Medical Equipment
  • Textile Machines
  • Telecom & Data Centres
  • Printing Machines
  • Machine with Sensitive Microprocessor
  • Engineering & Machine Tools.
  • Automobiles
  • CNC Machines
  • Lift & Elevators.
  • Plastic Machines
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What is a Servo stabilizer?

It is an automated electronic system built to attain constant voltage levels. They protect the appliances by forming a closed loop of an absolutely controlled system. Even if there is a fluctuation in the input voltage or load, the resulting output voltage will remain invariable. It is also commonly called Servo Controlled Voltage Stabilizer. It works on the principle of servomechanism or feedback. They are used for maintaining the accuracy of high voltages with an output correction of about +_ 1%. They are installed at various institutions like hospitals and clinics, food processing units, hotels, Flour mills, etc.

Chennai is currently the largest electronics hardware exporter in India. It contributes a major chunk of Indian exports. One such company based in Chennai is Nantech Power SystemsPvt Ltd. It is one of the most promising manufacturers and suppliers in the field of building powering equipment. A few specifications of its servo stabilizers are as follows:

  • It is a three-phase stabilizer that protects the appliance against the under-voltage condition or sag, over-voltage condition or surge, and other such imbalanced voltages.
  • Its design type includes an O/P sensing feedback system with a feedback mechanism where the feedback voltage controls the servo motor rotation. Its rotation adjusts the brushes' position on the autotransformer, creating a voltage difference. This voltage difference is then fed to the buck-boost transformer, a series transformer that stabilizes the output voltage and gives a stabilized and regulated output.
  • It has an Opto Coupler based Triac motor drive.
  • The type of motor is an A.C synchronous stepper motor, which when in the state of equilibrium, manages to bring the rotation of the shaft and the frequency of the supply current in a synchronous manner such that the rotation period and the integral number of AC cycles are equivalent to each other.
  • The output voltage can be adjusted to 415 V or 380 V, or 400 V.
  • True RMS is used for sensing and correction of voltage as it has more accuracy.
  • The overvoltage cut off has an upper limit of +5%, meaning that if there is an increase in voltage by 5%, there'll be a total cut off. The under-voltage cut off has a lower limit of -10%, which suggests that if there is a decrease in voltage by 10%, it will result in total cut off until the voltage comes back within the range. This will help in maintaining the safety of the appliance.
  • HRC fuse or MCB or MCCB are fitted at the input to prevent the appliance from getting damaged if there is a short circuit.
  • In case of overload, it will sustain a current greater than 10% of the maximum rated output current.
  • If one wishes to reset, the restart option is manual and automatic, depending on what the user wants. This makes it user friendly.
  • The servo stabilizer's efficiency is more than or equal to 98% with an inbuilt phase reversal protection.
  • With an ambient temperature of 0° to 50° C, it works with great efficiency.

Servo controlled voltage stabilizers are preferred over the other relay and static type of voltage stabilizers because they come with the exact system, react quickly to any variation in voltage, manufactured in a user-friendly manner with an overall well-equipped circuit ability to sustain a high voltage surge. There is absolutely no compromise on the security of the user. Furthermore, it acts like an amour for the appliance as well.

What Are The Different Types Of Servo Voltage Stabilizers?

Servo Voltage Stabilizers are important electrical components for the electrical wiring of the complex. It protects electrical equipment and machines by stabilizing the voltage input and protecting it from voltage fluctuations (both over and under supplies) and other voltage floods. Hence, this is also known as an Automatic Voltage Regulator(AVR). These work with many electromechanical transfers to give a suitable yield voltage, which is usually in an ideal range.
These come either in single-phase or three-phase units, depending on the use and the connection to limit the Kilovolt-Ampere (KVA) necessary. Three-phase units further come in two different types: Balanced Loadand Unbalanced Load models.
Furthermore, they are either for a piece of particular equipment or a spot or a major stabilizer unit for a group of apparatuses (E.g., an entire house). Also, they come in computerized or as simple stabilizer units.

There Are 3 Main Types Of Servo Voltage Stabilizers

Relay type Voltage Stabilizers

Apart from the transformer circuits, a rectifier circuit, controller unit, and other parts are used for bucking operations. These are relatively easy to use and have less weight, and are commonplace in households and businesses.

Instabilities are ±15% with yield exactness between ±5-10%.


  • Economical
  • Easy to use


  • Relatively poor construction
  • Less dependable
  • Poor reaction to voltage vacillation

Servo Controlled Voltage Stabilizers

They use servo engines to control voltage influx and hence are also called Servo Stabilizers. These have closed-circle frameworks and are basically used for high-precision voltage returns (typically around ±1%). These come in 3 types:

  • Single Phase Servo Based Voltage Stabilizers
  • Three Phase Balanced Type Servo Based Voltage Stabilizers
  • Three Phase Unbalanced Type Servo Based Voltage Stabilizers


  • Quickly reacts to changes in voltage.
  • High Precision in voltage stabilization
  • Firm construction and circuital housing
  • Ability to withstand high voltage floods


  • These stabilizers need intermittent upkeep and maintenance because of the moving parts.
  • The servo engine must be pre-validated to avoid problems, and the plan of servo motors needs a skilled worker.

Static Voltage Stabilizers

These stabilizers have static parts and hence no moving parts as compared to a servo voltage stabilizer. These stabilizers are extremely accurate and have an exactness of voltage adjustment range of just ±1%. These static voltage stabilizers contain 'Buck & Boost' Transformers, Microcontrollers, Microprocessors, and other important components.


  • Small Size
  • Rapid reaction to voltage vacillations
  • Remarkably high exactness of voltage adjustments
  • Breakneck correction speeds of 20kHz
  • Auto Bypass
  • Silent operation
  • No moving parts; hence, it is nearly upkeep free.
  • Very dependable units
  • High productivity

These stabilizers have static parts and hence no moving parts as compared to a servo voltage stabilizer. These stabilizers are extremely accurate and have an exactness of voltage adjustment range of just ±1%. These static voltage stabilizers contain 'Buck & Boost' Transformers, Microcontrollers, Microprocessors, and other important components.


  • Small Size
  • Rapid reaction to voltage vacillations
  • Remarkably high exactness of voltage adjustments
  • Breakneck correction speeds of 20kHz
  • Auto Bypass
  • Silent operation
  • No moving parts; hence, it is nearly upkeep free.
  • Very dependable units
  • High productivity

In conclusion, each unit has its own advantages and disadvantages, and one must carefully choose their unit according to their needs and specifications. Today, many companies are flooding the market with different types of products, and companies like Nantech Power Systems are at the top with high customer reliability and product line-up.

4 Incredible Benefits Of A Servo Voltage Stabilizer!

Servo voltage stabilizers find widespread use in several modern industries. Their ability to manage discrepancies in the input voltage and provide a steady output voltage has found takers not only in industries but also in homes, schools, and offices around the world. Find out what makes servo stabilizers so sought-after.

Before we delve into the very many benefits of a Servo voltage stabilizer, let us first find out what servo stabilizer manufacturers in Chennai say about it.

What Is A Servo Voltage Stabilizer?

A servo voltage stabilizer is one that uses a Servo motor to maintain the output voltage at the steady, rated value. The AC synchronous motor serves to control the input to a variable transformer which in turn regulates the output from the stabilizer. It scores over the more traditional relay-based voltage stabilizers in its voltage regulation capabilities.

Also Read: Know How To Buy The Right UPS!

Here Are Four Important Advantages Of Using A Servo Voltage Stabilizer in Chennai!

Prevents Equipment Damage

Industrial equipment is often susceptible to damage from voltage fluctuations. If the input voltage is not within permissible limits, they can suffer substantial harm resulting in a malfunction or even complete breakdown of the machinery. Servo stabilizers keep the input voltage within 1% of the rated value, making them the best possible choice for controlling input power to any industrial equipment.

Protects Equipment Operators

Voltage variations can cause severe malfunction of machinery, which can result in serious bodily harm or a grievous injury to the factory personnel working them. So, it is imperative that the input voltage is kept within permissible limits to ensure safety in the shop floor. Servo voltage stabilizers can handle up to 50% variation in input voltage while providing only a 1% deviation in the output voltage.

Saves Money

Servo voltage stabilizers offer excellent value for money. They are low maintenance devices that are durable, and easy to transport. This is in addition to the overall savings in electricity bills as the voltage is regulated to within 1% of the rated value. Not to mention the hidden savings in equipment repair and replacement as they do a great job of protecting them.

Servo Stabilizer Dealers in Chennai Say They Work For Domestic Uses Too!

Used For Non-Industrial Purposes Too

Not just in an industrial setting, servo voltage stabilizers are increasingly used for domestic purposes as well. Homes, schools are even offices are opting for these stabilizers to control the input voltage to refrigerators and air conditioning units. Besides saving on power, they also protect the appliances from voltage fluctuations as well as your family from a risk of electrical fire. They are available in a wide range of ratings to cater to industrial as well as domestic requirements.

Dealers Of Air Cooled Servo Voltage Stabilizer in Chennai Speak Of Its Other Benefits

In addition to the many advantages listed above, servo voltage stabilizers are also equipped to handle heavy loads, even 5000 KVA and above. It is available in both air-cooled and oil-cooled variations depending on the capacity. Since they provide stepless voltage correction at the rate of 25 volts per second, they are preferred over traditional relay-type stabilizers.

All these immense advantages make servo voltage stabilizers the ideal choice for voltage regulation in industries.

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